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OCCURRENCE LIST FOR THE EAST CENTRAL SHEET 51©00 Ministry of Hon Alan W. Pope Minister 1. Abconore Mines Limited Natural W.T Foster 2. Abeta Mining Corporation Resources Deputy Minister 3. Aggressive Mining Company Limited Ontario 4. Agnew Lake Mines Limited 5. Alanen, W., and Maki, E. ONTARIO GLOl OGICAI SURVt.Y 6. Alexander, A. MAP R 2426 7. Alford Explorations Limited 8. Alur Mines Limited MINERAL DEPOSITS SERIES 9. Anabar Mining and Development Company Limited 10. Anuwon Uranium Mines Limited 11. ArcoTriiler #2 URANIUM AND THORIUM 12. Assembly Mines Limited (Hutton Township} 13. Assembly Mines Limited 1A {Hutton Township) DEPOSITS OF ONTARIO 14. Assembly Mines Limited 1 7A (Parkin Township) 15. Astrabrun Mines Limited 16. Aubrey Falls EAST CENTRAL SHEET 17. Auginadong River 18. Balboa Uranium Mines Limited THUNDER BAY, P LGOMA, COCHRANE, SUDBURY, 19. Batchawana Uranium Mines Limited TIMISKAMI^l: A!\iO NIPISSING DISTRICTS 20. Bidgood Kirkland Mines 21. Big Game Mines Limited 22. Black Lake Scale l: l 013 76O or l Inch to 16 Miles 23. Blind River 24. Blue, P. G. ______ID 20^^ ^^ 30 , . . W 60 Mite 25. Bobcam Mines Limited O 20 10 HI 80 K i lorne l res 26. Borden Lake 27. Bousquet, L. R. 28. Boymar Gold Mines Limited NTS RfitRirncfis: 31 K,L,M; 32 D,E,L; 4 1 I,J,K,M,N,O.P; 29. Bracemar Mines Limited ^ 42 A,B,C,D,E,F,G.H.I,J.K,L 30. Brenner, R. 31. Brewis and White Limited ODM Geological Compilation Map: 2198 32. Bridges, J. R. 33. Broulan Reef Limited Central (Baldwin Township} OMNR OGS 1982 34. Broulan Reef Limited Lookout Tower (Baldwin Township} 35. Broulan Reef Limited Sutherland Creek Parts of this publication may be quoted if credit is given and the (Shakespeare Township) material is properly referenced. 36. Buftana Mines Limited This map is published with the permission of E.G. Pye, Director, 37. Burritt Island Ontario Geological Survey. 38. Callander Complex 39. Calmor Mines Limited 40. Calvin Township LEGEND

41. Camray Mines Limited CENOZOIC CLASTIC META5EDIMENTS QUATERNARY l Cnr.jjh©rirraie. greywacke, ori 42. Camray Mines Limited Theano Point AND RECEN1 l ile. ,1/Afw. si©ff stone, c/wt, f 43. Can-Fer Mines Limited S©artrf. grave©. cVay. 44. Canadian Johns-Manville Company Limited (Baldwin Township] METAVOLCANICs MESOZOIC 3 MAHC TO FELSIC METAVOLOMCS 45. Canadian Johns-Manville Company Limited (Grigg Township) CRETACEOUS 1B flows, tuff, breccia* minor irm [wn©j©mn 46. Canadian Johns-Manville Company Limited (Marconi Township) LOWER CRETACEOUS© and metasetfirnenls. ~ Clay, tat id. liffrnlti. linftilay. 47. Canagau Mines Limited quart; sand. SUPERIOR 48. Candore Explorations Limited AND SOUTHERN PROVINCES PALEOZOIC* LATE PRECAMBRIAN 49. Cane Township MISSISSIPPIAN KEWEENAWAN LO ft i K MISSISSIPPIAN 50. Caneonti Mines Limited 5EDIMENIAKT AMU VOLCANIC 51. Canuc Mines Limited IB Sfta©?, sandstone. we/wackc, 52. Chemical Research Corporation (Canada) Limited DEVONIAN nvart? porphyry. 53. Chevrette, E. UPPER UhVONIAN MIDDLE PRECAMBRIAN 54. Cline, E. H.

55. Coal Creek arKe, sAafc, argillite, irm: fama- 56. Cobalt Consolidated Mining Corporation ©__ t/on. limestone. 57. Coffee Lake HURONIAN COBALT GROUP7 58. Concession II and III (Dill Township) 59. Concession III (Dill Township) 60. Conecho Mines Limited ELLIOT LAKE. HOUGH LAKE 61. Consolidated Callinan Flin Flon Mines Limited QU1RKF LAKE GROUPS* G2. Consolidated Golden Arrow Mining Limited 63. Coral Rapids 64. Corner Lake EARLY FELSIC IGNEOUS AND 65. Cramette, C. METAMORPHIC ROCKS©* Cranodtorite, ffonat©-jemne, q LW/; diorite, 66. Crazy Lake quiriz irnnzonltf, gianrte. syer,!!*, quart? and feldspar porphyries, oegir.a- 67. Oestland Mines Limited file, iolite, unililtB©kiitiaKti migmatite; 5M predominated v miamatitif w/aspoi- 68. Crotch Lake i~:i?t~it? sntl (iiirtQ© .^Ji^/dvoj©c^©.v"©©

69. Cullis Lake KAPUSKASING GRANULITE COMPLEX 70. Cyr 71. Damascus Mines Limited

72. Deadhorse Creek Shale, limestone, dolomite, ssnrfsfone. 73. Deauville Exploration Limited diorite. aeCDio. norite, pyroxenite 74. Delcan Minerals Limited umniE ORDOVICIAN (/oiittr. dunite. t,c©iiei©fii;l!e. 75. Demorest Lake 76. Denison Mine (Main Mine) 77. Can-Met Mine 78. Roche Long Lac Mines Limited METAVOLCANICS 79. Roman Island CAMBRIAN FFLSiC TO INTFRMEOIATF MFTAVOICANICSP UPPER CAMBRIAN 80. Stanrock Mine We. rttyodacif©.© 3no ilarj©.r- f/frt1*.1;. tuffs, and breccias), chert, iron forma- i Conglomerate, sandstone, s 81. Denison Mines Limited (Seagram Township) tier1 , minor metasediment?, snO intru 82. Stancan Uranium Mines Limited sive roc*s. and ©elat&l miatialHps. LOWFR AND MIDDLE C 83. Patrick Mines Limited MAFIC METAVOLCANICSP9 Basalt, andesite fflaw t,, tufa and bitx- 84. Denison Mines Limited (Timmermans Township) Sandstone, conglomerate, shale. sprf/mews nnrf Irfrusfvr* rorfi©i, -wi f lated migmaiites 85. - Denison Mines Limited (Turner Township) PRECAMBRIAN 06. Denvic Lake MIDDLE TO LATE PRECAMBRIAN a A ,©p* small inlntsivr* tyx/iesofthi:; itfjr I©Wf h CARBONATITE-ALKALIC COMPLEXES* Meviltfifri ftv rftrlmrrrttir nrjc lintins methods. 87. Desbarats Mining Company Limited " May bf in pai l CQ©ts6f*atiie , riephehr.e and alkalic sys- 88. Dolan, J. P. is nitss, fenite and associated malic end -l ultramafic cat* s 89. Dominion Uranium Corporation d Formerly classified as Algoman and/or laurentian. LATE MAFIC IGNEOUS ROCKS" * fcrirtfi-iy classifier] ss C©pnviiie ar.attir Hastings 90. Dominion Gulf Company Limited (Baldwin Township) Series. t Rocks in these groups arc subdivided lithatoglcnlly 91. Dominion Gulf Company Limited (May Township) anrt ?np ntrfpr rices net nrvptsarilY imply ne? rp- lationship within or afionj groups. 92. Dominion Gulf Company Limited (Shakespeare Township) LATE FELSIC IGNEOUS ROCKS0 tt Includes Gsfai and Sibley Groups. 93. Duncan Township Gr,-n^ion!c, trondhfemrte, quarii mon * Includes G©jiilHnt and ftove Formaliuns, and the [irmaftor.s of l he Whitewater Group. Tnc White- 94. East Bay Gold Mines Limited zonite, granite, syenite. quattiDoretiyry, wnirr Group Ffymations ir ihr* ^r/rinur/ orfu mfty pegmatite, aplite, derived on/esses ana be of Archean ape.

95. Elizabeth Feldspar Mines Limited seo compttaliiw by S.S. Lut©ilie/sand V, G. Milne. 14A ©Anorthosite salite rocti,1 anortho l Inc/iidcs Gowiianda, Ltuiairj, Gordon Lake, Bar Geutoyical Branch, )97E. Ordinal compilation by site, gabbroic aiorthcsilc, twalite, 96. Empire Gold Mines Limited L, D. Ayres el*/. 1Q70. tnot©joiuiic anti syenite rocKs. quartz * Tlieae tfiree a©oups coileciivety *etv (oimi©ity monzatule, niimi oabbro, ultramafic cldJsSifled©isBnjcS GHJUO. lin.luijeiiiii ihese yruups aimpi©ed from publ/sfica and unpublished 97. Falconbridge Nickel Mines Limited ^ .219,2ax ,.. coc*s and derived gniesbuti. ate Ifie Matirie-iaa, MvKtm. Ramsay Lake, PCCDI:;. Mississagi. Briicc, Espanola. Serpent, Awcrr1!©, 98. Fano Uranium Mines Limited (Juillette Township) Geological Survey cii Canada, unpublished data on 1 --s, \ GRENVILLE PROVINCE Foimaiinriz. Snme of Ihe rnrk units ff©ong t b? rioni© 99. Fano Uranium Mines Limited (Timmermans Township) af aerfiftagnelie maps and other sources sfiorF cf lake Humr nw bf-nj Archean age. MIDOLE TO LATE PRECAMBRIAN m Futtiicily Llatauficcl ax HaHcybiin©an. cartography ty P. A. Wisbey flitf C. ff. Syrctl, 100. Fausten n formerly ctassifted as Jtrmskaming, Windtgakai:, Surveys and Mapping Srancl-, 13-7. EARLY MAFIC ANO ULTRAMAFIC Seine, Staeproc*. Keeucatin, unl-tater. Ma©StteH Original cartography Oy D. W. RoOeson, ©9/0. IGNEOUS ROCKS 101. Firesand River Lake. Manitou, CoiicliHihiiy. 47-00 Diorite, gabtitu, txrxlal©te, pyroxenite, further inforrr.slfw cr\ tr,c geology arid mining P ffir©nerlv class/tied as keewatin. Windigo^/!, 102. Fort Norman Explorations Incorporated regulations iriav be obtained from the Ontario Division 13 anorthosite, ami tlnrivcd mptannrphit: l ,©OC©*.©.. ci Mines. Ministry o! Natural /tesaurees, Parliament * Komztinir and utframaf/c volcanic flows ha©in bmii 103. Franz, J. N. Toronto. nnuaea wtfi iftese rock^ in s^Te localities. METASEDfMENTS^© 104. French River CARBONATE MFTASFDIMENTS Jurassic rocks are Ado*rr (o underlie tte twee Cretaceous rocks in the northern part o! ttir 105. Frye, H. E. 106. Gaitwin Explorations Limited 107. Gaidiner, M. C. 108. Gemico, A. G. 3 This Legend is from Ontario Geological Survey Map 2392, by S. B. 109. Genex Lumbers, 1979. 110. Gimby, J. E. 111. God©s Lake Mining Syndicate 112. Graham Lake Mining Syndicate SYMBOLS 113. Grey Trout-Blue Sky Lake 114. Gui-Por Uranium Mines and Metals Limited Deposit Type Reasonably Assured Reserves 115. Gutcher.J. Occurrences Less than Mure than 116. Harrison-Hibbert Ruby Mines 1 000 000 1 000 000 117. Harrison Minerals tons Ions 118. Harvard Uranium Mines Limited 119. Hathaway Metal Mines Limited RELATED TO IGNEOUS ROCKS 120. Hemlo Magmatic 121. Hennessey Uranium Explorations Incorporated (South Group) Carbonatites, alkalic complexes, 122. Highway 69 fenite, calc-alkaline extrusive o 123. Hollinger Mines Limited rocks 124. Howard, J. F. 125. Huclif Porcupine Mines Limited 208. Pitchore Uranium Mines Limited Magmatic-Metamorphic 126. Hunter Lake 209. Plexman. J. Pegmatite and granitic rocks. A A A 127. Hurd, D. 210. Plum Uranium and Metal Mines Limited Calc-silicate (skarnl rocks, 128. Ingamar Explorations Limited 211. Port Monroe pyroxenite O 1 29. Inspiration Mining and Development Limited 212. Prosco Limited O O 130. International Mining and Development Limited 213. Pruvencher, M. A. Veins 131. Iron Island 214. Punkari, A. Pitchblende vein (simple), pitch 132. Iso Mines Limited 215. Purdy Mica blende complex, uraninite-cal D D D cite-apatite-fluur ite 133. Jalore Mining Company Limited 216. Rae Lake 134. James, E. B. 217. Ranger Lake MARGINAL NOTES RELATED TO SEDIMENTARY 135. Jay-Dee Enterprises Incorporated 218. Ranrouyn Mines Limited ROCKS 136. Jeanette Minerals Limited 219. Ranwick Uranium Mines Limited INTRODUCTION Conglomerate 137. Jellicoe Mines Limited (1939) (Espanola Bay Area) 220. Rawhide Uranium Mines Limited Thorium Fe-oxide rich This map is one of four sheets ( p.2424, P.2425, P.2426. P.2427 ) re The pitchblende occurrences at Montreal River (Nuffield 1955) are of were recovered, however the operation did not come up to The deeper parts of the Blind River-Elliot Lake area westward to north IAEA O 138. Jellicoe Mines Limited (Baldwin Township) 221. Reserve Lake O vising maps (P.969 to P.972) published in 1975 and shows the dis historic interest because they include the first recorded uranium local expectations and underground development was terminated in 1980 of Sault Ste. Marie, the area northeast of Sudbury, and the Agnew Lake 1980: Uranium m the Pine Creek Geosyncline: Proceedings of the Robertson, J.A. 139. Jonsmith Mines Limited LJi-anium Fe-sulphide rich O 222. Richore Gold Mines Limited tribution and classification of Ontario©s uranium and thorium deposits. ity in Canada and provided one of the major steps to the discovery of with leaching of broken ore continuing into T981. area are exploration areas for sedimentary deposits in Ontario. The Ban International Uranium Symposium in the Pine Creek Geo 1968a: Uranium and Thorium Deposits of Northern Ontario; Ontario o O 140. Kamis Copper Mines Limited Rio Algom Limited The geological base is the l: l 013 760 or 1 inch to 16 mile Geological the Elliot Lake deposits (Lang et at. 1962; J.A. Robertson 1968h). Department of Mines, Mineral Resuurcti Circular 9, 10Gp. In the Bancroft camp between 1958 and 1969, four mines (Faraday, croft area, and possibly the Kenora area are of interest for pegmatite- syncline, Sydney 4-8 June 1979, Jointly sponsored hy BMR Argillite Map of Ontario. No radioactive deposits have been reported from the 141. Kaplan, M. 223. - Quirke Group West The most important sedimentary radioactive element deposits in Bicroft, Dyne and Greyhawk) produced approximately 11 000000 related deposits. Alkalic-carbonatite complexes, and "porphyry type" and CSIRO in cooperation with IAEA, IAEA Vienna 1980, 1968b:Geology of Township 149 and Township 150, District of Northeast sheet. An inset map of Bancroft, at a scale of 1 ;253 440 or 1 deposits of non-ferrous base or precious metals in the Early Precambrian 760 p. plus 4 maps 1:500 000. Sem, pelitic rocks, wacke 142. Kee#2 224. Span-North Mining Claims Ontario are the Blind River-Elliot Lake-Agnew Lake deposits (J.A. pounds U3O8 worth S105 000 000 (Hewitt 1967, p.1) with average Algoma; Ontario Department of Mines, Geological Report 57, inch to 4 miles has been provided. In general the format of the first (Archean) remain hypothetical or speculative sources of by-product 143. Kerr Addison Mines Limited Robertson I968b, 1976, 1978) which comprise 10 percent of the Jonasson I.R., and Dyck, W. 162p. Accompanied by Maps 2113 and 2114, scale l: 15840 225. - Nordic Group West edition has been retained with the following major changes: 1) the recovered grade of 1.79 pounds 1)303 per ton. Some 90 percent of uranium or thorium. Metamorphic pegmatites (grey) are also possible Carbonaceous 144. Kerr-McGee Corporation 150-151 Free World©s uranium resources exploitable at a cost of less than the production came from the Faraday (average recovery 1.99 pounds 1974: Some Studies of Geochemical Dispersion About a Small Uran or 1 inch to ©A mile. 226. - Quirke Mine No. 1 symbols denoting the deposits have been made smaller thus obscuring sites for uranium deposits, particularly in the Grenville Supergroup. Lignite;, anthraxolite, carbon S130.00 (US) per kg of uranium or less than S175.00 (Can) per kg of LJsOg per ton) and Bicroft Mines (average recovery 1.73 pounds U^OQ ium Showing, March Township, Ontario; p.61-63 in Report of 1971; A Review of Recently Acquired Geological Data, Blind River- 145. Kerr Lake Mine 227. - Quirke Mine No. 2 the geological base less, 2) grade of occurrences has not been shown for In the same sequence calc-silicate rocks have some potential. aceous material m sedimentary uranium (O.E.C.D. 1979; E.M.R. 1979). These are Lower Huronian per ton). The Faraday Mine reopened as Madawaska Mine in 1976 and Activities, Part B., November 1973 to Maich 1974.edited by Elliot Lake Area; Ontario Department ot Mines and Northern o o o 146. Kirkpatrick Lake those deposit types characterized by extremely variable mineralization, 228. - Spanish American (Early Proterozoic) pyritic oligomictic conglomerates carrying in the R.G. Blackadar, Geological Survey of Canada Paper 74-1, rocks and 3) listings of the deposits present have been added to each sheet since that date has prodjced 1 717 000 pounds U30g from 1 115000 Middle-Late Precambrian unconformities, for example at the margin Affairs, Miscellaneous Paper 45, 35p., reprinted m: Geological 147. Kirkwood Township 229. - Panel Mine matrix the minerals uraninite, brannerite, and monazite from which tons of ore with average recovery 951?t and recovered grade 1.49 pounds Part B 297p. using well known or popular names for deposits thus allowing the of the Lake Superior Basin, are of interest.for the so-called unconfor Association of Canada, Special Paper 12, 1973, p.169-198. 148. Keenirj, l. 230. - Pecors Lake East uranium, thorium, and yttrium can be recovered. The distribution of U3Og per ton. The 1979 production was 605 530 pounds mity-vein type of deposit, and although there are indications that the map-user to undertake further research. Since the preparation of the Kimberley, M.M. (editor) 1975; Uranium and Thorium Deposits of Ontario; Ontario Division Grade is indicated for any of the above symbols in the following way- 149. Kram, K., and Glowaski, J, the minerals shows marked correlation with pebblo size and other Ontario©s 1980 production was 4 275 000 kg (11 115 000 Ibs 231. - Buckles Mine first edition the exploration activity of the 1970s and the work of the appropriate processes were in operation there is as yet no indication 1978: Short Course m Uranium Deposits: Their Mineralogy and of Mines, Preliminary Maps P.969 Northwestern Sheet, P.972 sedimentary features (Theis 1979). The uraninite and monazite are held worth S413 481 000 and Canada©s G 386 000 kg Uranium (16 557 000 e.g. conglomerate, uranium rich occurrence, 150. Labine and McCarthy Uranium Mines Limited 232. LacnorMine Ontario Geological Survey in resource assessment, mineral inventory that they were sufficiently effective to form significant deposits. It Origin, Toronto, October 1978; Min. Assoc. Can. Handbook Southern Sheet. Scale 1:1 013 760 or 1 inch to 16 miles. to be detrital (J.A. Robertson 1968b; Roscoe 1969) but the "bran Ibs UsOg J worth S637 717 000 (EMR preliminary). The known (Gordon et al. 1981; Robertson in preparation) and mapping projects is anticipated that patterns revealed by metallogenic maps at this and, S 3, Toronto, 523p. 151. Lapska Mines Limited 233. - Milhken Mine nerite" may be the result of diagenetic or metamorphic mobilization of Compilation 1973, 1974. has permitted the assemblage of new or previously unpublishd in Ontario deposits can support annual production in excess of 12 000 in future, at larger scales will assist in defining suitable geological and NOT indicated 152. La Salle Yellowknife Gold Mines Limited 234. Nordic Mine uranium from the uraninite and redeposition on titaniferous minerals tons U30s, the precise level depending on the grade tonnage character Lang, A.H. 1976: The Blind River Uranium Deposits: The Ores and Their Setting; formation. geographical environments for concentrated exploration. (Thies 1979). The location of individual deposits is controlled by istics and the timing of each operat©on; in the Elliot Lake operations 1952: Canadian Deposits of Uranium and Thorium; Geological Survey Ontario Division of Mines Miscellaneous Paper 65. 153. Lebel Township 235. Stanleigh Mine Less than 0.75 pounds L^Og per Ton The classification used (see below and legend) is based on that of suitable Early Precambrian (Archean) source areas, ancient drainage The principle of using a systems approach to modelling: identifying of Canada, Economic Geology Series, No.16 (First Edition). 154. Leslie Lake 236. Pardee Amalgamated Mines Limited increased tonnage will be offset partly by the lower grade of the mill 1978: Uranium Deposits in Ontario; p.229-280 in Short Course in Robinson (1958) and is similar to that used in Canadian and Inter channels and shorelines, and possibly by penecontemporaneous mafic feed. The increased mill capacity can be obtained by further expansion geological factors critical to source, transportation, deposition, re- 155. Little White River 237. Pecors Lake West 1958: Metallogenic Map, Uranium in Canada; Geological Survey o© Uranium Deposits; Their Mineralogy and Origin edited by national Publications. (Lang 1952, 195B; Lang er al. 1962; Little volcanic piles (J.A. Robertson 1971, 1976, 1978; Roscoe 1969). of some current operations, reopening of closed mines, and the develop concentration and preservation, and the factors affecting extraction 0.75 to 1 .5 pounds UsOg per ton 156. Location X 238. St. Mary©s Uranium Mines Limited is strongly recommended, (see also Ruzicka 1977; Bendix 1978). Canada, Map 1045AM1, scale 1:7 603 200 or 1 inch to 120 M.M. Kimberley. Mineralogical Association of Canada, Toronto, 1974; O.E.C.D. 1979) particularly for aggregating data collected by a Similar deposits occur throughout the world (Houston and Karlstrom ment of new operations. miles. Metallogenic data compiled 1957. 157. Longlac 239. Vite Uranium Mines Limited wide variety of individuals or agencies. More detailed genetic classi 1979), and particularly in South Africa (Pretorius 1976), and Bra7il 1978. 1 Data compiled from Company Annual Reports and the public files ul More than 1.5 pounds L^Og per ton 158. Lunge, M. 240. Pronto Mine fications have been given by Barnes and Ruzicka (1972) modified by (Gross 1968). Many geologists believe they formed prior to full develop RESERVES Lang, A.H., Griffith, J.W. and Steacy, H.R. 1981: The Uranium Deposits of Ontario Their Distribution and Ruzicka (1975), McMillan (1977, 1978), Smirnov (1977) and in tha ment of an oxygen-rich atmosphere (D.S. Robertson et ai. 1978). All i/LI M R. 1962: Canadian Deposits of Uranium and Thorium; Geological Survey Classification; Ontario Geological Survey Miscellaneous Paper 159. MacFie Explorations Limited 241. Pistol Lake It has been estimated that the Ontario deposits, predominantly the 22 Deposits not classified manuals nd publications of the N.U.R.E. program of the U.S. Depart such deposits of commercial interest in Ontario (i.e. a minimum out of Canada, Economic Geology Series, No. 16 (Second Edition), 86. 242. Rio Tinto Canadian Exploration Limited sedimentary deposits of the Blind River-Elliot Lake-Agnew Lake area, REFERENCES 160. MacKay, D. ment of Energy (Bundix 1978). The Canadian deposits have also been lined tonnage of 1 million tons with a grade in excess of 0.5 kg U30g 324p. Accompanied by Map 1045A-M1, scale 1: 7 603 200 or contain some 553 000 metric tons2 uranium of which 125 000 are In preparation: 161. Madawanson Lake 243. Robb-Murmac Uranium Mines Limited discussed by Robertson and Lattanzi (1974), and the Ontario Deposits per ton over at least 2 m) are within arkosic sequences in the Matinenda 1 inch to 120 miles. Areas underlain by quartz-pebble conglomerate with eco Reasonably Assured (measured * indicated) and 428 000 are estimated Ayres, L.D. Uranium and Thorium Deposits of Northern Ontario 2nd 162. Manitou Islands 244. Roberts Lake by J.A. Rohertson (1978, 19813. Formation of the Elliot Lake Group and are within a few hundred nomic and sub-economic content of L^Og. (See Figure 1) additional (infeired + prognosticated) at a price of less than S156 per 1969: Setting Net Lake Area, District of Kenora (Patricia Portion), Little, H.W. Edition; Ontario Geological Survey, M.D.C. O 163. Manwood Mining Corporation Limited 245. Roche, F. D. metres stiatigraphically of the Middle-Early Precambrian (Ptoterozoic- pound UsOg (1978 price) (URAG data provided to the Porter Com Ontario Department of Mines, Preliminary Map P.538, scale 1974: Uranium Deposits m Canada - Their Exploration Reserves and Classification of Deposits Archean) unconformity, and are down-drainage from anomalously Robinson, S.C. 164. Martin, D. R. 246. Russian Lake mission). Their figures are compatible to those given by Roscoe for the 1: 15 840 or 1 inch to M mile. Geology 1968, 1969. Revised Potential; p.155-163 in Canadian Institute of Mining and radioactive (u-channel) areas of Early Precambrian (Late Archean) 1958: A Genetic Classification of Canadian Uranium Deposits; p. 165. Massey Bay 247. Sandy Stone Exploration and Development Company Limited Ontario©s radioactive element deposits fall into two broad groupings; total content of the Elliot Lake area, 500 000 tonnes uranium and 1970. Metallurgy Bulletin, March 1, 1974, Vol.67, No.743. 240p. those associated igneous and metamorphic rocks and processes, and quartz monzonite. 174 190 in The Canadian Mineralogist Volume 6, pt. 2, edited SOURCESOF INFORMATION 166. Matinenda Uranium Mines Limited Charron Lake Group the total figures given for Ontario by J.A. Robertson (1975) in the Barnes, F.Q., and Ruzicka, V. Masson, S.L., FI©I J Gordon, J.B. those which form an integral part of or were subsequently deposited Scattered mineralization is found in the shoreward arkosic facies of first edition of this map. Current allocations to economic and sub by L.G. Berry, 301p. 248. Sandy Stone Exploration and Development Company Limited 1972: A Genetic Classification of Uranium Deposits; p.159-166 in 1981: Radioactive Mineral Deposits of the Pembroke-Renfrew Area; 167. Mdttaini, C. and B. m sedimentary rocks. I he former may be: 1) disseminated magmatic the Mississagi Formation of the Hough Lake Group, but grade and economic categories, however, would reflect changes in costs and prices The principal sources of Mineral Deposits information are the Mineral International Geological Congress, 24th Session, Section 4, Ontario Geological Survey, Mineral Deposits Circular 23, 155p., Roscoe, S.M. 168. Maud Lake Kassigimini Lake Group deposits in granites, syenites, or carbonatites, or the metasomatic continuity are poor and thorium content approximates uranium con as well as operating experience and The earlier studies used different 1969: Huronian Rocks and Uraniferous Conglomerates in the Canadian Resources Circulars for Uranium and Thorium Deposits of Northern Mineral Deposits, 533p. accompanied by Preliminary Map. P.2210, scale 1:126 720 or deposits (fenites) associated with the latter; 2) the metamorphic- tent. In the Upper Huronian red beds are present, and at one horizon Shield; Geological Survey of Canada, Paper 68-40, 205p. and Southern Ontario (Robertson 1968a; Hewitt 1967; Gordon et al. 169. McCombc, J. G. 249. Sanseville, A. zones of influence for the measured, indicated, inferred and prognos 1 inch to 2 miles. magmatic deposits comprising a) pegmatitic segregations and apo- in the Lorrain Formation, of the Cobalt Group, quartz conglomerate Bendix 1981). This map supercedes Uranium and Thorium Deposits of Ontario, 170. IVtcCombe Mining Syndicate 250. Satellite Metal Mines Limited ticated categories. The data given to the Porter Commission (Porter Ruzicka, V.J. physes related to igneous or metamorphic rocks, and b) dissem beds and sandstones, with iron oxides, zircon and monzonite, carty 1978: Geologic Characteristic uf Environments Favourable for Uran McMillan, R.H. Ontario Division of Mines, Preliminary Map P.971, by J. A. Robertson 171. McDevitt, D. L. 251. Sauve and Inch 1978) was broken down as to measured 49 000 tU; indicated, 76 000 1975: New Sources of Uranium? Types of Uranium Deposits presently inations in calc-silicates or skarns formed as the result of metasomatic ium Deposits; prepared by Bendix Field Engineering Corpor 1977: Metallogenesis of Canadian Uranium Deposits - a Review; p.43- thorium but almost no uranium (J.A. Robertson 1968a, 1971, 1978). tU; inferred and prognosticated 182 000 tU; but not between economic unknown in Canada; p. 1320 in Uranium Exploration ©75; 1974. 172. McDonald Bay 252. Saville.T. and/or metamorphic processes; and 3) veins, previously considered ation for U.S. Department of Energy, Grand Junction Office, 55 in Geology, Mining and Extractive Processing of Uranium; This attests to a change in chemical, and possibly atmospheric, en and sub-economic. The Federal Government export allocation policy Geological Survey of Canada, Paper 75-26 Geological compilation by L. D. Ayres, S. B. Lumbers, V. G. Milne, and 173. McDonough, E. P. 253. Schaffer, D. the end stage of magmatic or metamorphic processes but which may vironment during Huronian times. In the area northeast of the Sud Colorado, G5BX-1,p. 1-250. M.J. Jones Editor. Proceedings of a Symposium Sponsored by is based on the measured resources, 0.8 times the indicated resources D. W. Robeson, Ontario Geological Survey and the Geological Survey in some cases be the result of supergene circulation of ground water. the Institute of Mining and Metallurgy London 1977. 171p. 1977: Fstimation of Undiscovered Uranium Resources in Canada; 174. Mcintyre Porcupine Mines Limited 254. Schlesingcr, H. bury basin, Lower Huronian rocks are again present, although precise and 0.7 times the inferred resources, and the prognosticated is re Breaks, F.W. Bond, W.D., and Denver Stone ot Canada, unpublished data on file with the Ontario Ministry of Several of these types may occur together, as in the Bancroft camp correlation with those of the Blind River-Elliot Lake-Agnew Lake garded as so uncertain that it is not used for computing the allowable p.-39-56 in Uranium Resources Evaluation ER77-1, Energy 175. McKellar Creek- 255. Scabrock Lake (related to the same assemblage of rock types) (Satterly 1956; Hewitt 1978: Preliminary Geological Synthesis of the English River Sub- 1978: Genetic Aspects and Classification of Important Canadian Natural Resources, interpretation of aeromagnetic maps, and other area is not possible (Meyn 1973). Sporadic conglomeratic deposits resource base, indeed the 1978 and 1979 URAG assessments have re Mines and Resources Canada. 176. Millacqua Mines Limited 256. Shunck, R. 1967; Robertson 1978; Masson and Gordon 1981), or as in the Theano Province, Northwestern Ontario, and its Bearing upon Mineral Uranium Deposits; p.187-204 in Short Course in Uranium sources. of Blind River type are known. There also is uranium mineralization duced the Ontario prognosticated to 179 and 147 thousand metric 177. Molson Lake Point - Montreal River area where they are related to differing geo Exploration; Ontario Geological Survey, Miscellaneous Paper Deposits: Their Mineralogy and Origin, edited by M.M. Kimber Satterly, J. 257. Silvermaque Mine in impure (argillaceous! sandstone and arqillites (Thomson 1960: J.A. tons respectively whereas there have only been minor changes in the 1956: Radioactive Mineral Occurrences in the Bancroft Area; Ontario Assessment Files Research Office, Ontario Geological Survey, Toronto. logical sellings, the Early Piecambi lan (Archean) granitic rocks (peg 72, 55p. Accompanied by Preliminary Map P.1972. ley Mineralogical Association of Canada, Toronto, 1978. l 78. Molybdenum Corporation 258. Silvermaque Mining Limited Robertson 1968a, 1978; Meyn 1973; Meyn and Matthews 1910, p. ot©ier categories. Department of Mines, Vol. 65, pt.6 181p. (Published 1957). Resident Geologist©s Files, Ministry of Natural Resources, Ontario. matite) and the contact zones of Late Precambrian diabase dikes Darnley, A.G. Meyn, H.D. 179. Moon Lake Mines Limited (Bolger Township) 259. Smith, D. E. 141-142). The role of carbonaceous material in Ontario deposits is The reserves, in a mining sense, constitute some 7% of the Western (veins) (Nuffield 1955; Robertson 1968a, 1978). In recent years 1972: Airborne Gamma-Ray Survey Techniques; p.174-211 in Uran 1973: The Proterozoic Sedimentary Rocks North and Northeast of Smirnov, V.T. (Editor) Note: The Mines Group, Ontario Ministry of Natural Resources, would 180. Moon Lake Mines Limited (Timmermans Township) 260. Soo-Tomic Uranium Mines Limited (Giles Township) apparently minor. Thucholite occurs locally in the Blind Riuer de world©s reserves and also contain at least 100 000 tons of recoverable many European geologists and those working on the Athabasca de ium Prospecting Handbook, Proceedings of a NATO-sp on sored Sudbury,© Ontario; p. 129 145 in Huronian Stratigraphy and 1977: Ore Deposits of the U.S.S.R.; Translation by D.A. Brown, welcome comment, revisions, new data, and suggestions for the posits and there is trace uranium mineralization in the lignite of the Th02. In 1979 Ontario had 62^o of Canada©s measured, indicated 181. Mosher, A. C., and Eyles, G. 261. Soo-Tomic Uranium Mines Limited (Slater Township) posits in and the East Alligator River area of North Advanced Study Institute, edited by S.H.U, Bowie, Michael Sedimentation edited bv G.M. Young, Geological Association Pitman Publishing, London, 3 Volumes 1977. preparation of a later edition of this map. These should be sent James Bay Lowlands and with anthraxolite veins near Thunder Bay. and inferred uranium resources whereas Saskatchewan had 33^0. As 182. Mount Lake Area 262. Sowerby ern Territory, Australia (Smith 1974; and papers in Dunn 1976; IAEA Davis and Dennis Ostle, London, The Institution of Mining of Canada, Special Paper No. 12, Montreal, Pierre Des Marais Smith, E.E.N. to the Chief, Mineral Deposits Section, Ontario Ministry of The anthraxolite veins near Thunder Bay may have been derived by discoveries continue to be made in Saskatchewan, Ontario©s propor a. Quebec Corporation 263. Soweska River 1980; Kimberley 1978; Hoere and Sisbald 1979) have proposed and Metallurgy, 346p. Inc., 271p. 1974: Review of Current Concepts Regarding Vein Deposits ot Uran Natural Resources, Ontario Geological Survey, Queen©s Park, lateral secretion from the country rocks containing them. In 1972 an tions of resources, which have remained static in absolute amount, will that many pitchblende-bearing veins are actually supergene deposits ium; presented by Symposium on the Formation of Uranium Toronto. b, Wakman, W. J., and Grinnicke, R. 264. Spencer, W. airborne gamma-ray spectrometer survey led to the discovery of radio drop. Significant additions to resources continue to be made in Australia, Dunn, C.E. Meyn, H.D, and Matthews, M.K. deposited in suitable traps near and typically below unconformities Ore Deposits, International Atomic Energy Agency, Athens c. Soderstrom and Hammerstrom 265. Spragge Creek active hydrocarbon, the uranium probably deposited from groundwater, Brazil and Nigeria (OECD 1979). 1976: Uranium in Saskatchewan. Proceedings of a Symposium; Sask 1980: Uranium Deposits of the Cobalt Embayment; p.195-199 representing land surface and providing a plumbing system at the in Paleozoic dolomitic sandstones in March Township near Ottawa atchewan Geological Society, Special Publication No. 3, 396p in Summary of Field Work, 1980, by the Ontario Geological Greece 6-10 May 1974, IAEA-SM-183/45. d. Silver Men Mines Limited 266. Steel, Gushing, and Larson time of enrichment. CREDITS (Jonasson and Dyck 1974). The March formation also carries minoi Extensive and costly exploration and development is required to con Survey, edited by V.G. Milne. O.L. White, R.B. Barlow, J.A. 183. Napray Mining Company Limited 267. Stencill, V. firm and transpose resources from prognosticated to inferred and EMR Theis, N.J. In many cases assessment or other data available may not be sufficient amounts of copper mineralization. Robertson and A.C. Colvine. Ontario Geological Survey, Misci?!- 1979: Uranium Bearing and Associated Minerals in Their Geochemical 268. Stewart, W. ultimately to reserves. To allow for discovery, development, production, 1979: 1978 Assessment of Canadas Uranium Supply and Demand; Compilation by J. A. Robertson 1973-1974, 1980-1981. 184. Nasco Cobalt Silver Mines Limited to permit diagnostic objective classification ot a deposit. In particular, aneous Paper 96. 201 p. and Sedimentological Context, Elliot Lake, Ontario; p.1 50 and processing such exploration must be underway in eight and prefer Energy, Mines and Resources, Canada, Report EP. 79-3, 30p. 185. Neil. J. P. 269. Stobie Township the distinction between igneous and metamorphic pegmatites and their PRODUCTION Nuffield, E.W. and sections in Geological Survey of Canada, Bulletin 304, subtypes is difficult. However the only commercial radioactive pegma ably ten years before the anticipated use. It should be pointed out Gordon, J.B., Rybak, U., and Robertson, J.A. Plotting and drafting by K. L. Gould 1981. 186. Nern^gosenda Lake 270. Sugar Lake To the end of 1979 Ontario has produced 246 000 000 pounds 1955: Geology of the Montreal River Area; Ontario Department of 1979. 50p. tite deposits in Ontario are those of the complex unzoned pegmatites that licensing and construction of reactors may take up to fifteen 1981: Uranium and Thorium Deposits of Southern Ontario; Ontario 187. New Insco Mines Limited 271. Surluga.T. from 109 000 000 tons of ore with an average recovered grade of Mines, Volume 64, pt. 3, 32p. (published 1956) Accompanied of the Bancroft area, which are related to the Bancroft Syenite belt years, adding to the uncertainty of forecasting of demand. Whilst Geological Survey, Open File Report 5311, 665p. Thomson, J.E. Every possible effort has been made to ensure the accuracy of the in 188. New Mylamaque Exploration Limited 272. Sutherland, W. D. 2.25 pounds ^Og per ton (including The leaching operation at Agnew the current uisnium market and prices are relatively soft (S25.00 US by Map 1955-1, Scale 1:31 680 or 1 inch to V* mile. I960: Uranium and Thorium Deposits at the Base of the Huronian formation presented on this map. However, the Ontario Ministry of and to the lowermost sedimentary units of the Grenville Supergroup Lake). Gross, W.H. 189. Noranda Mines Limited Marcia Lake (Clary Township) 273. Tarbutt Mines Limited in an area of amphibolite facies metamorphic effects with deposition per pound ^Og. Northern Miner, 12 Feb. 1981) the longer term OECD System m the District of Sudbury; Ontario Department of Natural Resources does not assume any liability for errors that may oc 1968: Evidence for a Modified Placer Origin for Auriferrous Con cur. Users may wish to verify critical information; sources include both 190. Noranda Mines Limited Yorston Lake (DeMorest Township) 274. Thorncrest Explorations Limited facilitated by favourable structures and composition of the host rocks. Between 1955 and 1979 the Blind River camp has produced (from 13 markets remain promising, although Ontario faces competition from 1979: Uranium Resources Production and Demand: A Joint Report by Mines, Geological Report, 40p. Accompanied by sketch maps. glomerate Canevierras Mine Jacobium, Brazil; Economic Geol the references listed here and information on file at the Resident or Other pegmatite types of the Bancroft area, the white pegmatites of mines) approximately 234 000 000 pounds U30s from 102 000 000 the higher grade deposits being discovered in Saskatchewan and the OECD Nuclear Energy Agency and the International Atomic 191. Noranda Mines Limited (Hyman Township) 275. Tomlinson, H. D. ogy Vol.63, p.271-276. Regional Geologist©s Office and the Mining Recorder©s office nearest the Kaladar-Sharbot Lake area, the red pegmatites of the Kenora- tons of ore grading 2.29 pounds U308 per ton. The production reached Australia. The continued escalation of hydrocarbon prices and the Energy Agency, December 1979; Organization for Economic 192. Noranda Mines Limited Pilgrim Creek (Turner Township) 276. Tooker, E. O. map-area. Dryden area and the grey-white pngmatitfis of the English River Gneiss a peak in 1959 when 12 150 tons UsOg were produced. In 1979 three ecological and transportation problems facing the resurgent coal in Hewitt, D.F. Cooperation and Development, 135p. Paris, France, 1979. (This 277. Tough, G. 193. Nordic Resources Limited Belt (Breaks et ai. 1978; J.A. Robertson 1978) and the Bearhead Lake- mines were operating in the Elliot Lake area: dustry and the delays in developing breeder reactors, and other alter 1967: Uranium and Thorium Deposits of Southern Ontario; Ontario report published every two years) 194. North Creelman 278. Towle, G. and Humpage, J. native energy sources, including fussion, ensure that uranium will Department of Mines, Mineral Resources Circular 4, 76p. Favourable Lake area (Ayres 1969) have also been explored but grades Denison Mines Limited Denison Mine: 4 495 800 pounds U3Og Porter, A, (Chairman) Issued 1982 be a major energy source well into the 21st century. 195. O©Brien Fowler Associates 279. United Cobalt Mines Limited are too fow and factors such as location and mineralogy po^e additional from 2 440 000 tons, recovery 1.84 pounds Hoeve, Jan, and Sibbald T.I.I. 1978: A Race Against Time - Interim Report on Nuclear Power in 280. Van Lakp Prospecting Syndicate problems. UsOg per ton 1979: On the Genesis of Rabbit Lake and Other Unconformity-type 196. Trip Ottawa Associates PROSPECTING Ontario; Royal Commission on Electric Power Planning, 277p. Uranium Deposits in Northern Saskatchewan, Canada; Econ Information from this publication may be quoted if credit is given. It is 197. Palangio.C. 281. Vankoughnet Township In addition to the pegmatite deposits calc-silicate units carrying dis Rio Algom Limited Quirke Mine: 5 294 000 pounds UsOg Pretorius, D. Prospecting for uranium (and thorium) is largely based on geological omic Geology Vol. 73, (Special Issue devoted to the Geology seminated uraninite also occur within the Bancroft area. A number of from 2 348 000 tons, recovery 2.3 pounds recommended that reference to this map be made in the following form: 198. Patrick Uranium Mines Limited 282. Wadge Mines modelling followed up where suitable by geophysical and geochemical and Geochemistry of Uranium) p.1460-1473, 1976: The Natune of the Witwarcisrand Gold-Uranium Deposit; p.29- these with grades of approximately 0.5 kg UgOg per ton have been U30g per ton Robertson, J. A. 199. Peer, L. L. 283. Wanup Feldspar Mines Limited studies (including radiation and radon surveys) as in the Early Pre 88 in Handbook of Stratabound and Stratiform Ore Deposits, explored and are included in resources. The marble units and some Hood, P.J. edited by K.H. Wolf. Elsevter, Amsterdam. 200. Peerless Uranium Mining Corporation Limited 284. Web Panel Mine: 394 000 pounds ^03 from cambrian (Archean) and Grenville terrains or by diamond drilling, 1982: Uranium and Thorium Deposits of Ontario, East Central Sheet, pyroxenites may be amenable to crushing and separation thus creating 1981: Mineral Exploration Trends and Development in 1980 of 247 000 tons (reopened in 1979). recovery Drilling is the only reliable exploration tool for the buried Huronian Robertson, D.S. and Lattanzi, C.R. Thunder Bay. Algoma, Cochrane, Sudbury, Timiskaming, and 201. Pennebec Mining Corporation 285. Weston, D a concentrate suitable for addition to a conventional (acid leach) mill Ground Survey Techniques Drillhole Methods; Canadian Mining 1.6 pounds U30g per ton (Company annual deposits. Considerable use can be expected of gamma-ray spectrometry, 1974: Uranium Deposits of Canada; p. 9-21 in Geoscience Canada, Nipissing Districts; Ontario Geological Survey, Map P.2426, 2Q2. Pennwood Gold Mines Limited 286. West Thessalon (J.A. Robertson 1978). Of the magmatic type deposits, one, the Mani Journal, Jan 1981, p.44-56. reports) both airborne (Parnley 1972) and for core logging. The use of minia May 1974, edited by G.V. Middleton, Vol. 1, No. 2, 51p. Mineral Deposits Series, Scale 1:1 013 760 or 1 inch to 16 203. Phillips, R. B. 287. Whiskey tou Island deposit in Lake Nipissing, was developed as a niobium and preparations were underway to reopen the Stanleigh Mint?. The Houston, R.S. and Karlstrom. K.E. miles. Compilation 1973-1974, 1980-1981. uranium prospect; in recent years an ijolite-nepheline syenite contact turized radiation detection and geophysical instruments for down Robertson, D.S., Tilsley, J.E. and Hogg, G.M. 204 Pic Bamoos Prospecting Syndicate 288. Wilson, C. W. Agnew Lake Mine was operating using leaching of broken ore in under 1980: Uranium Bearing Quartz-Pebble Conglomerates: Exploration zone within the Prairie Lake Alkalic Complex north of Marathon has hole logging is being developed (Hood 1981), particularly as the oil 1978: The Time-bound Character of Uranium Deposits; Economic 205. Pick Uranium Mines Limited 289. Yost ground stopes and in a surface stockpile. In 1979 448 000 pounds companies participate in the search for alternative energy sources. Model and United States Resource Potential; prepared tor the also been prospected (J.A. Robertson 1978). U.S. Department of Energy, Grand Junction Office. Colorado, Geology Vol. 73 (Special Issue Revised to the Geology and 206. Pickle Crow Mines Limited 290. Zenrnac Metal Mines Limited (Raimbault Township} Geochemistry of Uranium) p. 1409-1419. GJ. BX-1,p.1-509. 207. Picton Uranium Mines Limited 291. Zenmac Metal Mines Limited (Timmermans Township}